Question

Praire dogs live in underground burrows with at least two entrances. They ventilate their burrows by building a mound around one entrance, which is open to a stream of air. A second entrance at ground level is open to almost stagnant air. Use Bernoulli's principle to explain how this construction creates air flow through the burrow.

The sum of all forms of energy in a fluid flowing along an enclosed path (a streamline) is the same at any two points in that path.


is this right?

Air flowing over the mound must accelerate, and Bernoulli's principle will cause the air pressure to be lower there than at the other end of the burrow. This difference in pressures will help ventilate the burrow.

Yes.

Your statement about all forms of energy being constant along a streamline is not necessarily true, and is not Bernoulii's principle. Pressure is not a form of energy, but kinetic energy doe increase when it drops. There can be heat transfer between steamlines while the Bernouli equation remains valid, in incompressible flow.

Answer 1

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Answer 2

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